DATASHEET
Similis
SR4C005 •
lamiiANT®
Features
• Antenna for 3G and 4G/LTE applications including MIMO
• GSM850, GSM900, DCS1800, PCS1900, WCDMA2100, LTE B7 (25002690MHz), LTE B40 (2300 – 2400 MHZ)
• Low profile innovative design
• Incorporates DFI (Designed For Integration) to prevent de-tuning
• Maintains high performance within low profile package
• Supplied on Tape and Reel
• Automotive temperature rating
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DATASHEET: SIMILIS
SR4C005-PS-2.01
Contents
1.
Description
2
2.
Applications
2
3.
General data
2
4.
Part number
3
5.
RF characteristics
3
6.
RF performance
4
6 . 1. Return loss
4
6 . 2. VSWR4
6 . 3. Efficiency
5
6 . 4. Antenna pattern
6
6 . 5. Optimising antenna efficiency
10
7.
Antenna dimensions
11
8.
Schematic symbol and pin definition
12
9.
Host PCB footprint
12
10.
Electrical interface
13
1 0 .1. Transmission line
13
1 0 .2. Matching circuit
13
11.
Antenna integration guide
14
1 1 .1. Antenna placement
14
1 1 .2. Host PCB layout
15
1 1 .3. Host PCB clearance
15
Reference board
16
12.
1 2 .1. Reference board matching circuit
16
13.
Soldering
17
14.
Hazardous material regulation conformance
17
15.
Packaging
17
1 5 .1. Optimal storage conditions
17
1 5 .2. Tape characteristics
18
1 5 .3. Reel dimensions
19
1 5 .4. Box dimensions
19
1 5 .5. Bag properties
20
1 5 .6. Reel label information
20
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DATASHEET: SIMILIS
1.
SR4C005-PS-2.01
Description
Similis uses a ground plane on the host PCB to radiate efficiently, as well as
requiring a clearance area around the antenna. The antenna needs an external
matching circuit to match it to the frequency bands used. The antenna is ideal
for 3G and 4G, as well as diversity/MIMO antennas.
2.
•
•
•
•
•
3.
Applications
earable devices
W
Portable devices
Remote monitoring / IoT devices
Telematics systems
Network equipment / Pico base-stations
General data
FREQUEN CY
824-960MHz
1710-2170MHz
2300-2400MHz
2500-2690MHz
POLARIZA TION
Linear
OPERATING TEM PERATURE
-40°C to 140°C
E N V I RONMENTAL CO NDITION TEST
ISO16750-4 5.1.1.1/5.1.2.1/5.3.2
I MPEDANCE WITH MATCHING
50 Ω
WEIGHT
56%
>60%
MAXIMUM RETURN LOSS
-5dB
-7dB
MAXIMUM VSWR
3.4:1
2.4:1
2300-2 4 0 0 M H Z
2500-2690MHZ
PEAK GAIN
3.7dBi
4.1dBi
AVERAGE GAIN (LINEAR)
-1.9dBi
-1.8dBi
AVERAGE EFFICIENCY
>65%
>66%
MAXIMUM RETURN LOSS
-10dB
-9dB
MAXIMUM VSWR
1.9:1
1.9:1
All data measured on Antenova’s evaluation PCB Part
No. SR4C005-U1
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DATASHEET: SIMILIS
6.
SR4C005-PS-2.01
RF performance
6.1.
Return loss
6.2.
VSWR
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DATASHEET: SIMILIS
6.3.
SR4C005-PS-2.01
Efficiency
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DATASHEET: SIMILIS
6.4.
SR4C005-PS-2.01
Antenna pattern
6.4.1.
824 MHz – 960 MHz
3D pattern at 880MHz
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DATASHEET: SIMILIS
6.4.2.
SR4C005-PS-2.01
1710 MHz – 2170 MHz
3D pattern at 1930MHz
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DATASHEET: SIMILIS
6.4.3.
SR4C005-PS-2.01
2300 MHz – 2400 MHz
3D pattern at 2340MHz
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DATASHEET: SIMILIS
6.4.4.
SR4C005-PS-2.01
2500 MHz – 2690 MHz
3D pattern at 2580MHz
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DATASHEET: SIMILIS
6.5.
SR4C005-PS-2.01
Optimising antenna efficiency
All Antenova cellular antennas require a ground plane on the host PCB for
best radiation efficiency, especially in the sub-GHz bands. On an ideal PCB the
antenna would want to see a minimum of a quarter wavelength at the lowest
frequency used required of ground plane behind it. See the example below of
the effect of reducing the ground plane length from ~¼ wavelength in 10mm
steps for a typical FR4 cellular antenna.
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DATASHEET: SIMILIS
7.
SR4C005-PS-2.01
Antenna dimensions
Top view
L
W
H
Length
Width
Height
40.0 ±0.1
10.0 ±0.1
1.7 ±0.1
All dimensions in (mm)
2.0
1.0
Bottom view
8.4
9.0
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9.5
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DATASHEET: SIMILIS
8.
SR4C005-PS-2.01
Schematic symbol and pin definition
The circuit symbol for the antenna is shown below. The antenna has 10 pins
with only 2 as functional. All other pins are for mechanical strength.
P IN
DESCRIPTION
3
Feed (Transceiver port)
1
Return/GND
2, 4, 5, 6, 7, 8,
9, 10
9.
NC (Not used, mechanical only)
Host PCB footprint
The recommended host PCB footprint is below.
10
9
1
8
2
7
3
6
4
5
Pads 1-10 = 2.0 x 1.0 (mm)
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DATASHEET: SIMILIS
10.
10.1.
SR4C005-PS-2.01
Electrical interface
Transmission line
All transmission lines should be designed to have a characteristic impedance
of 50Ω.
• The length of each transmission lines should be kept to a minimum
• All other parts of the RF system like transceivers, power amplifiers, etc,
should also be designed to have a 50 Ω impedance
A co-planar transmission line can be designed using an online transmission
line calculator tool, such as:
https://blog.antenova.com/rf-transmission-line-calculator
The PCB thickness, copper thickness and substrate dielectric constant are
entered, then the tool calculates the transmission line width and gaps on
either side of the track to give a 50 Ω impedance.
10.2.
Matching circuit
The antenna requires a matching circuit that must be optimized for each
product. The matching circuit will require up to six components and the
following circuit should be designed into the host PCB. Not all components
may be required but should be included as a precaution. The matching
network should be placed close to the antenna feed to ensure it is optionally
effective in tuning the antenna.
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DATASHEET: SIMILIS
11.
SR4C005-PS-2.01
Antenna integration guide
We recommend the following during the design phase to maximise antenna
performance and minimize noise:
•
•
•
•
Minimum 4 layer PCB
Route signals and power internally where possible
Flood all layers with ground
Knit ground on all layers together with plenty of vias
Follow placement guidance carefully, in addition Antenova provide technical
support to help you through all stages of your design. Register for an account
on https://ask.antenova.com/ to access technical support.
11.1.
Antenna placement
The best position for the antenna is in the corner of the short side of the PCB.
This allows the longer side of the PCB to be a ground plane, a long ground
plane improves the antenna’s efficiency. The antenna requires clearance
ideally in 5 spatial directions as shown below. Where this cannot be achieved
you should keep as many clear as possible to a minimum of 3. Please note
performance will degrade with fewer clearances.
The Antenova placement tool can be used to advise on antenna placement,
see: https://blog.antenova.com/intelligent-antenna-selection-and-placementtool-antenova
Correct
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DATASHEET: SIMILIS
11.2.
SR4C005-PS-2.01
Host PCB layout
The host PCB must be designed using the PCB footprint shown with the
correct clearances. An example of the PCB layout shows the antenna
footprint. Please note this clearance area is critical to the performance of the
antenna and must be applied through all layers of the PCB.
D=3.0mm
All dimensions in (mm)
11.3.
Host PCB clearance
The diagram below shows the antenna footprint and clearance through all
layers on the PCB. Only the antenna pads and connections to feed and GND
are present within this clearance area.
Placement of components and GND with traces adjacent to the antenna
should maintain a minimum clearance of 15mm from either side. The antenna
should therefore be placed in the corner to only have one side affected.
Similis
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DATASHEET: SIMILIS
SR4C005-PS-2.01
Reference board
12.
A reference board is used for evaluating the antenna SR4C005 and it includes
a SMA female connector. (Part number: SR4C005-U1)
110mm
To order a reference board
please see antenova.com
40mm
Front view
12.1.
Back view
Reference board matching circuit
D E S IGNATOR
TYPE
VALUE
DESCRIPTION
L1
Inductor
1.2nH
Murata LQG15HN series
L2
Inductor
22nH
Murata LQG15HN series
L3
Inductor
2.7nH
Murata LQG15HN series
C1
Capacitor
12pF
Murata GJM15 series
C2, C3
Capacitor
0.5pF
Murata GJM15 series
L2
L1
C1
C2
L3
C3
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DATASHEET: SIMILIS
SR4C005-PS-2.01
Soldering
13.
This antenna is suitable for lead free soldering. The reflow profile should be
adjusted to suit the device, oven and solder paste, while observing the following
conditions:
• For leaded soldering, the maximum temperature should not exceed 240 ºC.
• For lead free soldering, a maximum temperature of 255 ºC for no more than
20 seconds is permitted.
• The antenna should not be exposed to temperatures exceeding 120 ºC
more than 3 times during the soldering process.
Hazardous material regulation conformance
14.
The antenna has been tested to conform to RoHS and REACH requirements. A
certificate of conformance is available from Antenova’s website.
Packaging
15.
15.1.
Optimal storage conditions
TEMPERATURE
-10ºC to 40ºC
HUMIDITY
Less than 75% RH
SHELF LIFE
24 Months
STORAGE PLACE
Away from corrosive gas and direct sunlight
PACKAGING
MSL LEVEL
Reels should be stored in unopened sealed
manufacturer’s plastic packaging.
1
Note: Storage of open reels of antennas is not recommended due to possible
oxidization of pads on antennas. If short term storage is necessary, then it is
highly recommended that the bag containing the antenna reel is re-sealed and
stored in conditions as described in the tabel above.
The shelf life of the antenna is 2 years provided the factory seal on the
package has not been broken.
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DATASHEET: SIMILIS
15.2.
SR4C005-PS-2.01
Tape characteristics
P0
P1
P2
D0
4.00 ± 0.1
16.00 ± 0.1
2.00 ± 0.1
1.50 ± 0.1
E
F
W
1.75 ± 0.1
26.20 ± 0.15
56.00 ± 0.3
All dimensions in (mm)
QUANTITY
LEADING SPACE
TRAILING SPACE
1000 pcs / reel
25 blank antenna holders
25 blank antenna holders
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DATASHEET: SIMILIS
15.3.
SR4C005-PS-2.01
Reel dimensions
A
C
N
W1
330.0 ± 2.0
13.0 ± 0.5
178.0 ± 0.5
56 ± 2.0
All dimensions in (mm)
15.4.
Box dimensions
W I DTH (W)
BREADTH (B)
HEIGHT ( H )
350mm
355mm
70mm
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DATASHEET: SIMILIS
15.5.
SR4C005-PS-2.01
Bag properties
Reels are supplied in protective plastic packaging.
15.6.
Reel label information
Quality statements
Antenova’s products conform to REACH and RoHS legislation. For our
statements regarding these and other quality standards, please see
antenova.com.
Antenova reserves all rights to the contents of this document. Antenova
gives no warranties based solely on the accuracy or completeness of the
contents of this document and reserves the right to make changes to the
specifications of the products described herein at any time and without
notice.
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DATASHEET: SIMILIS
SR4C005-PS-2.01
Antenna design,
integration and test
resources
Product designers – the details contained in this datasheet will help you to
complete your embedded antenna design. Please follow our technical advice
carefully to obtain optimum antenna performance.
We aim to support our customers to create high performance wireless products.
You will find a wealth of design resources, calculators and case studies to aid
your design on our website.
Antenova’s design laboratories are equipped with the latest antenna design tools
and test chambers. We provide antenna design, test and technical integration
services to help you complete your design and obtain the required certifications.
If you cannot find the antenna you require in our product range, please contact us
to discuss creating a custom antenna to meet your exact requirements.
Share knowledge with RF experts around the world.
Visit antenova.com
ask.antenova is a global forum for
designers and engineers working
with wireless technology.
Order antenna samples and
evaluation boards, and read our
antenna resources
VISI T A S K . A N T E N O V A
VISIT ANTENOVA.COM
Request a volume quotation for antennas:
Global headquarters
sales@antenova.com
Antenova Ltd, 2nd Floor Titan Court, 3 Bishop
Square, Hatfield, AL10 9NA
+44 (0) 1707 927589
Copyright® Antenova Ltd. All Rights Reserved. Antenova®, gigaNOVA®, RADIONOVA®, the Antenova product family names and the Antenova logos
are trademarks and/or registered trademarks of Antenova Ltd. Any other names and/or trademarks belong to their respective companies. The
materials provided herein are believed to be reliable and correct at the time of printing. Antenova does not warrant the accuracy or completeness
of the information, text, graphics or other items contained within this information. Antenova further assumes no responsibility for the use of this
information, and all such information shall be entirely at the user’s risk.
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